White Top; Common Wallaby Grass, Ringed Wallaby Grass
Perennial grass 13cm-90cm tall. Leaves with a hairy to hairless sheath at the base. Ligule a fringe of hairs. Leaves 15-35cm long, 1-4mm wide, flat, or threadlike with the edges rolled inwards under dry conditions, hairless or hairy. Spikelets green to purplish, becoming straw-coloured, 12-24mm long excluding the longest awn. Mature seed groups oval to cylindrical. Seeds with three awns. Austrodanthonia caespitosa in SA.
Description and photo (pages 80-81) and line drawing of seed (page 80 Fig. 16b) (as Danthonia caespitosa) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales
ausgrass2 description, photos, and line drawings: http://ausgrass2.myspecies.info/content/rytidosperma-caespitosum